Subtraction fact · doubles
10 − 5 = 5
Ten minus five is five. 10 is double 5, so taking away 5 leaves the other half.
See 10 − 5
10 counters, 5 crossed out, 5 left.
It's half of a double
- Remember the double: 5 + 5 = 10.
- Take one of those 5s away.
- The other 5 is left, so 10 − 5 = 5.
Its fact family has two facts
5, 5 and 10 go together, so learning one of these helps with all of them. See the family.
Practice 10 − 5 in a game
A fact sticks when a child has to pull it from memory again and again. In this game 10 − 5 keeps coming back between the other facts in its family.
Every round leans on 10 − 5
Free to play · no signup · works on phones, tablets and computers
Quick quiz
10 − 5 FAQ
What is 10 − 5?
10 − 5 = 5. In words: ten minus five is five.
How can I check 10 − 5 = 5?
Add back: 5 + 5 = 10. If the addition gives the number you started with, the subtraction is right.
What grade learns 10 − 5?
Facts within 10 are a first grade goal: Common Core standard 1.OA.C.6 asks for fluency adding and subtracting within 10.
Is Sumtown really free?
Yes. The whole game plays free in your browser, with no signup, no ads and no time limit. All fourteen mini games are in it. An iPhone app is on its way, and you can read what it will add.
An app is on its way
We're building a Sumtown app for iPhone with the parts that need a real app: offline play for car rides, a town map that remembers how far your child got, and a parent report on every fact. Until then, the whole game is free right here.
Coming soon on theApp Store